Spinning bowl



June 10, 1930. J. c. HENSING ET AL SPINNING BOWL Filed June 5, 1928F/Zj. 7

Patented June 10, i930 UNITED STATESKPATENT OFFICE J'OHANN CARL HENSING,OF AERNHEM, AND JAN WILLEM LUBBERHUIZENQ OF EBB, NETHERLANDS, ASSIGNOBSTO NAAMLQOZE VENNOOTSCHAP NEDERLANDSCHE- KUNST ZIJ'DEI FABRIEK, 0FARNHEM, NETHERLANDS SPINNING sown Application filed June 5, was, SerialNo. acacia, and in the Netherlands September 22, rear.

Our invention relates to a spinning bowl, particularly for use in theartificial silk industry.

The spinning bowls hitherto in use have flat bottoms, this constructionhaving been considered essential to the formation of a good cheese. Ithas, however, transpired that there are advantages, hereinafter set out,in not having the bottom flat.

According to our invention, therefore, the spinning bowl possesses thecharacteristicthat its bottom has a central depression, which may becircular or annular or other wise shaped. According to our inventionsaid depression may also be designed so as to Widen out in the downwarddirection.

Our invention comprises also a form in which orifices for the dischargeof li uids are provided at the under side of sai de pression. v I

-In the case of a spinning bowl. consisting of a plurality of parts andprovided with an inwardly bent lower wall, the latter, ac-

' cording to our invention, may be furnished with a downwardlygb'entportion adapted t be fixed, by rolling, pressing or other means,

in the central depression. Further, accord.-

ing to our invention, the depression may be filled up again after thedownwardly bent portion has been fixed therein.

Two embodiments of our invention are illustrated, by way of example, onthe accompanying drawing whereonz- Fig. 1 represents a vertical sectionthrough a spinning bowl provided with a depression in *accordance withour invent1on. V

Fig. 2 represents a vertical section .through a spinning bowl comprisinga drawn aluminium shell and a foot secured thereon.

In the construction shown in Fig. 1, the spinning bowl consists of theshell 1,- which merges into the base 2 and the 'foot 3. .The base 2 isprovided with a central depression 4, from which openings 5 passobliquely outwards through the foot 3.v Said foot houses, in the usualmanner, a bush 6 by means of which the spinning bowl is mountedon thespindle. Orifices 7 in thelower ed shell permitthe discharge, during theno tation of the bowl,.of the acid adhering to the fresh yarn.

According to Fig 2, the spinning bowl consists of a drawn aluminiumshell 1 hav ing an inwardlybent lower wall 2 which rests upon the baseand upon which the yarn lies in the shape of a cake or cheese.

In this embodiment, the foot 3 which depends from the base is of castaluminium, and is made'with an upstanding flange 8 surrounding theshelll. The base is provided in its upper surface with a concentricdepression 4. The wall 2 of the shell has f a downwardly bent centralportion 9 secured in the depression 4 by pressing, rolling or othermeans. Liquid discharge openings 5 pass obliquely outwards from the e ofthe depression through the foot, whi e discharge orifices 7 are alsoprovided in the vertical wall'of the shell. 9

One advantage of the last described spinning bowl is that, owing to-thedepression 4:, the shell 1 with its lower wall 2 can be conveniently andfirmly secured to' the "On the other hand, the provisionof a de-'pression 4 with discharge orifices5 enables the liquid that isintroduced into the 'fun- 1 nel in spinning tobe discharged withoutcoming into contact with the spun thread. In the ordinary spinningbowlnot provided with such a depression this liquid can only escapethrough the orifices? in the shell, so that spun cakes or cheeses ofinferior quality often result.

What is claimed as new and desired to be 7 secured by Letters Patentis 1. A spinning bowl comprising a'shell,

a foot and a base, one of the latter parts having a concentricdepression in its upper surface, .the depression extending substantiallybelow the upper surface of the said part, the depression being flaredoutwardly in a downward direction, and liquid discharge openings leadingfrom the base.

2. A spinning bowl comprising a base provided in its upper surface witha concentric depression, a foot depending from the base, a shell havingside walls and an a inwardly bent lower wall, the lower wall resting onthe base and being provided with a downwardly bent central portionsecured in the concentric depression, and the depression extendingsubstantially below the upper surface of the base.

3. A spinning bowl as claimed in claim 2, wherein the downwardly bentportion of the shell and the depression are flared outwardly in adownward direction.

4.- A spinning bowl as claimed in claim 2 k wherein 'the downwardly bentortion 0t the lower wall of the shell and 51a depression are. flaredoutwardly ina downward direction, and wherein the base is provided withopenings leading from the bottom of the de ression to permit of thedischarge of liquid therefrom.

so In testimony whereof we aflix our signatures; n J OHANN CARLHENSING'. Y JAN W'ILLEM LUBBERHUIZEN.'

